It's obviously not going to be possible to move the event now.
I wonder if they've ever given any thought to remote competition options if athletes can't travel? It's just this seems to be happening a lot now. China not being allowed into Australia in 2020, Armenia being practically unable to go to Baku, Israelis not going to Cairo last year for safety reasons.
Not that it's a good solution either, throws up all kinds of problems, but one can conceive of situations where it might be the path of least resistance.